Hello and thanks for the query
In my opinion your problem is all related to your stress
only. If there is any abnormal growth or mass than it will be surely seen in barium X-ray. Also your heart is normal as per your ECHO report so nothing to worry about.
If you have any doubt even now than you should go for endoscopy
and relax your mind with a normal report. I am sure it will came back normal.
Do regular gargles with lukewarm water and keep yourself hydrated. Stop smoking
and alcohol. If again your problems continues than consult your psychiatrist
Hope you got your answer.